Deepak Bhole Sr. Software Engineer, Red Hat Inc. May

(1)

(2)

05/06/11

Deepak Bhole

Sr. Software Engineer, Red Hat Inc.

May 5

th

2011

Java - From OpenJDK to Red Hat Enterprise Linux

and What Lies Ahead

(3)

●

OpenJDK/IcedTea

●

History of Java

●

OpenJDK

●

IcedTea

●

Red Hat's role

●

The future of Java

●

Version 7

●

Version 8

●

Questions

Agenda

Persistent index will always show current point

This presentation is designed to be used with audio as a primary mode of content delivery. If you have downloaded it,

see notes section for rough notes on applicable slides (draft quality). For pdf, it should be at the end of the slide deck.

(4)

History of Java

●

OpenJDK/IcedTea

●

History of Java

●

OpenJDK

●

IcedTea

●

Red Hat's role

●

The future of Java

●

Version 7

●

Version 8

●

Questions

●

Timeline:

1997

Java 1.1

Java 1.2

1998

2002

Java 1.4

Java 5

2004

Java 6

2006

2011

Java 7

1999

LibGCJ

Classpath

2003

GCJ

Plugin

2006

Java

sources

GPLd

2012?

Java 8

+

GCJ stands for

G

NU

C

ompiler for

J

ava

(5)

OpenJDK

Community

●

OpenJDK/IcedTea

●

History of Java

●

OpenJDK

●

What?

●

vs JDK

●

IcedTea

●

Red Hat's Role

●

The future of Java

●

Version 7

●

Version 8

●

Questions

Apple

+

JDK stands for

J

ava

D

evelopment

K

it

(6)

OpenJDK vs JDK (current)

●

OpenJDK/IcedTea

●

History of Java

●

OpenJDK

●

What?

●

vs JDK

●

Current

●

Future

●

IcedTea

●

Red Hat's Role

●

The future of Java

●

Version 7

●

Version 8

●

Questions

JDK

OpenJDK

●

HotSpot Virtual machine

●

Interpreter

●

JIT (

J

ust

I

n

T

ime) compiler

●

Tools (javac, javadoc, etc.)

●

Class libraries

●

Public API (

A

pplication

P

rogramming

I

nterface)

●

Deployment tools

(7)

OpenJDK vs JDK (future)

●

OpenJDK/IcedTea

●

History of Java

●

OpenJDK

●

What?

●

vs JDK

●

Current

●

Future

●

IcedTea

●

Red Hat's Role

●

The future of Java

●

Version 7

●

Version 8

●

Questions

JDK

OpenJDK

●

Interpreter

●

JIT compiler

●

Tools (javac, javadoc, etc.)

●

Class libraries

●

Public API

●

Deployment tools

●

Serviceability tools

(8)

OpenJDK6 vs JDK6

●

OpenJDK/IcedTea

●

History of Java

●

OpenJDK

●

What?

●

vs JDK

●

6

●

7

●

IcedTea

●

Red Hat's Role

●

The future of Java

●

Version 7

●

Version 8

●

Questions

JDK6 (closed)

OpenJDK (7)

OpenJDK6

JDK7

Proprietary

Semi-open (development in open + some proprietary patches)

Open

(9)

OpenJDK7 vs JDK7

JDK

OpenJDK

●

Interpreter

●

JIT compiler

●

Class libraries

●

Public API

●

Deployment tools

●

Serviceability tools?

95%

+

5%

+

As heard at JavaOne

Closed

●

OpenJDK/IcedTea

●

History of Java

●

OpenJDK

●

What?

●

vs JDK

●

6

●

7

●

IcedTea

●

Red Hat's Role

●

The future of Java

●

Version 7

●

Version 8

●

Questions

(10)

What is IcedTea?

IcedTea

…...

●

OpenJDK/IcedTea

●

History of Java

●

OpenJDK

●

IcedTea

●

What?

●

Why?

●

IcedTea-Web

●

Red Hat's Role

●

The future of Java

●

Version 7

●

Version 8

●

Questions

Image sources:

http://www.openclipart.org/detail/22436

(11)

Some of the contributors...

●

OpenJDK/IcedTea

●

History of Java

●

OpenJDK

●

IcedTea

●

What?

●

Who is involved?

●

Why?

●

IcedTea-Web

●

Red Hat's Role

●

The future of Java

●

Version 7

●

Version 8

●

Questions

(Indirectly through OpenJDK)

All logos are copyright by their respective owners

(12)

Some of the users...

●

OpenJDK/IcedTea

●

History of Java

●

OpenJDK

●

IcedTea

●

What?

●

Who is involved?

●

Why?

●

IcedTea-Web

●

Red Hat's Role

●

The future of Java

●

Version 7

●

Version 8

●

Questions

(13)

Why was IcedTea created?

(For the first release...)

Build

●

OpenJDK/IcedTea

●

History of Java

●

OpenJDK

●

IcedTea

●

What?

●

Why?

●

IcedTea-Web

●

Red Hat's Role

●

The future of Java

●

Version 7

●

Version 8

●

Questions

Image sources:

(14)

To fix the build...

Build

●

OpenJDK/IcedTea

●

History of Java

●

OpenJDK

●

IcedTea

●

What?

●

Why?

●

IcedTea-Web

●

Red Hat's Role

●

The future of Java

●

Version 7

●

Version 8

●

Questions

Image sources:

(15)

To fill what's missing...

JDK

●

Interpreter

●

JIT compiler

●

Class libraries

...

●

Deployment tools

●

Deployment tools

●

OpenJDK/IcedTea

●

History of Java

●

OpenJDK

●

IcedTea

●

What?

●

Why?

●

IcedTea-Web

●

Red Hat's Role

●

The future of Java

●

Version 7

●

Version 8

●

Questions

(16)

To back patch fixes...

JDK

●

Interpreter

●

JIT compiler

●

Tools (javac, javadoc, etc.)

●

Class libraries

...

●

Deployment tools

●

Deployment tools

●

OpenJDK/IcedTea

●

History of Java

●

OpenJDK

●

IcedTea

●

What?

●

Why?

●

IcedTea-Web

●

Red Hat's Role

●

The future of Java

●

Version 7

●

Version 8

●

Questions

(17)

To support additional architectures...

JDK

●

Interpreter

●

JIT compiler

●

Class libraries

...

●

Deployment tools

●

Deployment tools

Shark/Zero

●

OpenJDK/IcedTea

●

History of Java

●

OpenJDK

●

IcedTea

●

What?

●

Why?

●

IcedTea-Web

●

Red Hat's Role

●

The future of Java

●

Version 7

●

Version 8

●

Questions

Implemented independently

Image sources:

(18)

To support additional tools...

JDK

●

Interpreter

●

JIT compiler

●

Class libraries

...

●

Deployment tools

●

Deployment tools

●

OpenJDK/IcedTea

●

History of Java

●

OpenJDK

●

IcedTea

●

What?

●

Why?

●

IcedTea-Web

●

Red Hat's Role

●

The future of Java

●

Version 7

●

Version 8

●

Questions

(19)

Fixes (with OpenJDK)

I found a bug, here

is the patch!

Thanks! It will be in

the next update

whenever it

happens*

* OpenJDK has a slower release cycle and it is not set in advance

●

OpenJDK/IcedTea

●

History of Java

●

OpenJDK

●

IcedTea

●

What?

●

Why?

●

IcedTea-Web

●

Red Hat's Role

●

The future of Java

●

Version 7

●

Version 8

●

Questions

Image sources:

(20)

Fixes (with IcedTea)

I found a bug,

here is the

patch!

the next update

soon*!

●

OpenJDK/IcedTea

●

History of Java

●

OpenJDK

●

IcedTea

●

What?

●

Why?

●

IcedTea-Web

●

Red Hat's Role

●

The future of Java

●

Version 7

●

Version 8

●

Questions

(21)

I found a bug,

here is the

patch!

the next update

soon!

Here is a nice

patch from Mr.

Green.

Thanks! It will be

in the next update!

…...

No problem! We will

maintain it locally till then.

●

OpenJDK/IcedTea

●

History of Java

●

OpenJDK

●

IcedTea

●

What?

●

Why?

●

IcedTea-Web

●

Red Hat's Role

●

The future of Java

●

Version 7

●

Version 8

●

Questions

(22)

Co-ordinated security

JDK

OpenJDK

IcedTea

Distros

Update

planned

Patches

sent

Distros

notified

Public release

●

OpenJDK/IcedTea

●

History of Java

●

OpenJDK

●

IcedTea

●

What?

●

Why?

●

IcedTea-Web

●

Red Hat's Role

●

The future of Java

●

Version 7

●

Version 8

●

Questions

Not in code base

In code base, not public

In code base, public

(23)

IcedTea-Web

Web Browser Plugin

Web Start (javaws)

Settings tool (itweb-settings)

●

OpenJDK/IcedTea

●

History of Java

●

OpenJDK

●

IcedTea

●

What?

●

Why?

●

IcedTea-Web

●

Red Hat's Role

●

The future of Java

●

Version 7

●

Version 8

●

Questions

Image sources:

(24)

Fully Open Source

+

Classpath Exception

●

OpenJDK/IcedTea

●

History of Java

●

OpenJDK

●

IcedTea

●

What?

●

Why?

●

IcedTea-Web

●

Red Hat's Role

●

The future of Java

●

Version 7

●

Version 8

●

Questions

+

GPL stands for GNU

G

eneral

P

ublic

L

icense

++

LGPL stands for GNU

L

esser

G

eneral

P

ublic

L

icense

Image source: http://www.gnu.org/graphics/official%20gnu.svg

GPL

(25)

Completeness

Plugin is almost fully complete

Web Start is slightly lagging, but has support for all of

the widely used features

●

OpenJDK/IcedTea

●

History of Java

●

OpenJDK

●

IcedTea

●

What?

●

Why?

●

IcedTea-Web

●

Red Hat's Role

●

The future of Java

●

Version 7

●

Version 8

●

Questions

(26)

Co-ordinated security

IcedTea

Distros

Update

planned

Distros

notified

Public release

●

OpenJDK/IcedTea

●

History of Java

●

OpenJDK

●

IcedTea

●

What?

●

Why?

●

IcedTea-Web

●

Red Hat's Role

●

The future of Java

●

Version 7

●

Version 8

●

Questions

Not in code base

(27)

Settings configuration tool

●

OpenJDK/IcedTea

●

History of Java

●

OpenJDK

●

IcedTea

●

What?

●

Why?

●

IcedTea-Web

●

Red Hat's Role

●

The future of Java

●

Version 7

●

Version 8

●

Questions

(28)

●

OpenJDK/IcedTea

●

History of Java

●

OpenJDK

●

IcedTea

●

What?

●

Why?

●

IcedTea-Web

●

Red Hat's Role

●

The future of Java

●

Version 7

●

Version 8

●

Questions

(29)

IcedTea6

Red Hat

Others

0

500

1000

1500

2000

2500

IcedTea6 commits

Total Red Hat commits: 2159 out of 2587*

●

OpenJDK/IcedTea

●

History of Java

●

OpenJDK

●

IcedTea

●

Red Hat's Role

●

IcedTea

●

IcedTea-Web

●

Upstream

●

RHEL/Fedora

●

The future of Java

●

Version 7

●

Version 8

●

Questions

(30)

IcedTea (7)

Red Hat

Others

0

500

1000

1500

2000

2500

IcedTea (7) commits

●

OpenJDK/IcedTea

●

History of Java

●

OpenJDK

●

IcedTea

●

Red Hat's Role

●

IcedTea

●

IcedTea-Web

●

Upstream

●

RHEL/Fedora

●

The future of Java

●

Version 7

●

Version 8

●

Questions

(31)

Role in IcedTea-Web

Red Hat

Others

0

50

100

150

200

250

IcedTea-Web commits

●

OpenJDK/IcedTea

●

History of Java

●

OpenJDK

●

IcedTea

●

Red Hat's Role

●

IcedTea

●

IcedTea-Web

●

Upstream

●

RHEL/Fedora

●

The future of Java

●

Version 7

●

Version 8

●

Questions

(32)

●

OpenJDK7 OpenJDK6

●

Majority of OpenJDK6 commits are backports

●

The backport process

●

Red Hat is the primary backporter for

OpenJDK6

●

OpenJDK/IcedTea

●

History of Java

●

OpenJDK

●

IcedTea

●

Red Hat's Role

●

IcedTea

●

IcedTea-Web

●

Upstream

●

RHEL/Fedora

●

The future of Java

●

Version 7

●

Version 8

●

Questions

(33)

OpenJDK7 contribution

* Figures are approximate, and do not account for merge commits

** Apple's contributions have been normalized from 81/8889 (OSX port) to 76/8337

Oracle+Community

Google

Red Hat

Apple

1

10

100

1000

10000

OpenJDK7 commits

As of 2011-04-28, 16:00 EDT*

Total: 8337

Oracle + community: 7998

Google: 136 (1.63%)

Red Hat: 127 (1.52%)

Apple: 76** (0.09%)

(

Logarithmic

)

●

OpenJDK/IcedTea

●

History of Java

●

OpenJDK

●

IcedTea

●

Red Hat's Role

●

IcedTea

●

IcedTea-Web

●

Upstream

●

RHEL/Fedora

●

The future of Java

●

Version 7

●

Version 8

●

Questions

(34)

IcedTea* contribution

Red Hat

Others

0

500

1000

1500

2000

2500

IcedTea6 commits

Red Hat

Others

0

500

1000

1500

2000

IcedTea (7) commits

Red Hat

Others

0

50

100

150

200

250

IcedTea-Web commits

2159 out of 2587, 83.4%

1988 out of 2431, 81.7%

223 out of 234, 95.3%

●

OpenJDK/IcedTea

●

History of Java

●

OpenJDK

●

IcedTea

●

Red Hat's Role

●

IcedTea

●

IcedTea-Web

●

Upstream

●

RHEL/Fedora

●

The future of Java

●

Version 7

●

Version 8

●

Questions

(35)

OpenJDK RPM in RHEL

OpenJDK

IcedTea

RPM

●

OpenJDK/IcedTea

●

History of Java

●

OpenJDK

●

IcedTea

●

Red Hat's Role

●

IcedTea

●

IcedTea-Web

●

Upstream

●

RHEL/Fedora

●

The future of Java

●

Version 7

●

Version 8

●

Questions

(36)

Upstream first policy

OpenJDK

IcedTea

RPM

Accepted upstream

IcedTea release

RHEL release

OpenJDK release

●

OpenJDK/IcedTea

●

History of Java

●

OpenJDK

●

IcedTea

●

Red Hat's Role

●

IcedTea

●

IcedTea-Web

●

Upstream

●

RHEL/Fedora

●

The future of Java

●

Version 7

●

Version 8

●

Questions

Red Hat Enterprise Linux release is subject to results of:

●

TCK tests

(api, compiler, dev)

●

Jtreg tests

(regression)

●

Mauve tests

(class library)

●

Spec* tests

(performance)

●

Java2dBenchmark tests

(drawing perf.)

(37)

Prioritized release

OpenJDK

IcedTea

RPM

Accepted upstream

IcedTea release

Prioritized release

OpenJDK release

●

OpenJDK/IcedTea

●

History of Java

●

OpenJDK

●

IcedTea

●

Red Hat's Role

●

IcedTea

●

IcedTea-Web

●

Upstream

●

RHEL/Fedora

●

The future of Java

●

Version 7

●

Version 8

●

Questions

Release subject to results of:

●

TCK (api, compiler, dev) tests

●

JTreg (regression) tests

●

Mauve (class library) tests

●

Spec* (performance) tests

●

Java2dBenchmark (drawing perf.) tests

●

JFCMark (swing perf.) tests

(38)

Links

I will be at Campground 3 from 2PM to 3PM today

OpenJDK:

http://openjdk.java.net/

IcedTea:

http://icedtea.classpath.org/

IcedTea-Web:

http://icedtea.classpath.org/wiki/IcedTea-Web

IcedTea Bugs:

http://icedtea.classpath.org/bugzilla/

RHEL/Fedora bugs:

http://bugzilla.redhat.com

Mailing List:

[email protected]

IRC:

irc.oftc.net, #openjdk

Deepak Bhole

[email protected]

dbhole on irc

(39)

(40)

JMX Enhancements

●

ManagementFactory.getAllPlatformMXBeanInterfaces()

●

Everything inherits from PlatformManagedObject

●

New MBeans

●

java.lang.management.BufferPoolMXBean

●

java.lang.management.PlatformLoggingMXBean

●

OpenJDK/IcedTea

●

History of Java

●

OpenJDK

●

IcedTea

●

Red Hat's Role

●

The future of Java

●

Version 7

●

JMX enhancements

●

Language changes

●

nio2

●

Fork/Join framework

●

Rest..

●

Version 8

●

Questions...

(41)

Switches in String

●

OpenJDK/IcedTea

●

History of Java

●

OpenJDK

●

IcedTea

●

Red Hat's Role

●

The future of Java

●

Version 7

●

JMX enhancements

●

Language changes

●

Strings in switch

●

try-with-resources

●

Diamond operator

●

Numeric literals

●

multi-catch

●

@SafeVarArgs

●

...

●

...

●

...

(42)

Switches in String

●

OpenJDK/IcedTea

●

History of Java

●

OpenJDK

●

IcedTea

●

Red Hat's Role

●

The future of Java

●

Version 7

●

JMX enhancements

●

Language changes

●

Strings in switch

●

try-with-resources

●

Diamond operator

●

Numeric literals

●

multi-catch

●

@SafeVarArgs

●

...

●

...

●

...

(43)

try-with-resources – try1

●

OpenJDK/IcedTea

●

History of Java

●

OpenJDK

●

IcedTea

●

Red Hat's Role

●

The future of Java

●

Version 7

●

JMX enhancements

●

Language changes

●

Strings in switch

●

try-with-resources

●

Diamond operator

●

Numeric literals

●

multi-catch

●

@SafeVarArgs

●

...

●

...

●

...

(44)

●

OpenJDK/IcedTea

●

History of Java

●

OpenJDK

●

IcedTea

●

Red Hat's Role

●

The future of Java

●

Version 7

●

JMX enhancements

●

Language changes

●

Strings in switch

●

try-with-resources

●

Diamond operator

●

Numeric literals

●

multi-catch

●

@SafeVarArgs

●

...

●

...

●

...

(45)

●

OpenJDK/IcedTea

●

History of Java

●

OpenJDK

●

IcedTea

●

Red Hat's Role

●

The future of Java

●

Version 7

●

JMX enhancements

●

Language changes

●

Strings in switch

●

try-with-resources

●

Diamond operator

●

Numeric literals

●

multi-catch

●

@SafeVarArgs

●

...

●

...

●

...

(46)

try-with-resources in JDK7

●

OpenJDK/IcedTea

●

History of Java

●

OpenJDK

●

IcedTea

●

Red Hat's Role

●

The future of Java

●

Version 7

●

JMX enhancements

●

Language changes

●

Strings in switch

●

try-with-resources

●

Diamond operator

●

Numeric literals

●

multi-catch

●

@SafeVarArgs

●

...

●

...

●

...

(47)

What JDK7 does (approximately)

●

OpenJDK/IcedTea

●

History of Java

●

OpenJDK

●

IcedTea

●

Red Hat's Role

●

The future of Java

●

Version 7

●

JMX enhancements

●

Language changes

●

Strings in switch

●

try-with-resources

●

Diamond operator

●

Numeric literals

●

multi-catch

●

@SafeVarArgs

●

...

●

...

●

...

(48)

The AutoCloseable Interface

●

OpenJDK/IcedTea

●

History of Java

●

OpenJDK

●

IcedTea

●

Red Hat's Role

●

The future of Java

●

Version 7

●

JMX enhancements

●

Language changes

●

Strings in switch

●

try-with-resources

●

Diamond operator

●

Numeric literals

●

multi-catch

●

@SafeVarArgs

●

...

●

...

●

...

(49)

Diamond operator

●

OpenJDK/IcedTea

●

History of Java

●

OpenJDK

●

IcedTea

●

Red Hat's Role

●

The future of Java

●

Version 7

●

JMX enhancements

●

Language changes

●

Strings in switch

●

try-with-resources

●

Diamond operator

●

Numeric literals

●

multi-catch

●

@SafeVarArgs

●

...

●

...

●

...

(50)

Diamond operator

●

OpenJDK/IcedTea

●

History of Java

●

OpenJDK

●

IcedTea

●

Red Hat's Role

●

The future of Java

●

Version 7

●

JMX enhancements

●

Language changes

●

Strings in switch

●

try-with-resources

●

Diamond operator

●

Numeric literals

●

multi-catch

●

@SafeVarArgs

●

...

●

...

●

...

(51)

Diamond operator

// prints 1

// prints 2

Example posted to coin-dev list by Neal Gafter ([email protected])

●

OpenJDK/IcedTea

●

History of Java

●

OpenJDK

●

IcedTea

●

Red Hat's Role

●

The future of Java

●

Version 7

●

JMX enhancements

●

Language changes

●

Strings in switch

●

try-with-resources

●

Diamond operator

●

Numeric literals

●

multi-catch

●

@SafeVarArgs

●

...

●

...

●

...

(52)

Binary Literals

●

OpenJDK/IcedTea

●

History of Java

●

OpenJDK

●

IcedTea

●

Red Hat's Role

●

The future of Java

●

Version 7

●

JMX enhancements

●

Language changes

●

Strings in switch

●

try-with-resources

●

Diamond operator

●

Numeric literals

●

multi-catch

●

@SafeVarArgs

●

...

●

...

●

...

(53)

Binary Literals

●

OpenJDK/IcedTea

●

History of Java

●

OpenJDK

●

IcedTea

●

Red Hat's Role

●

The future of Java

●

Version 7

●

JMX enhancements

●

Language changes

●

Strings in switch

●

try-with-resources

●

Diamond operator

●

Numeric literals

●

multi-catch

●

@SafeVarArgs

●

...

●

...

●

...

(54)

Underscores in numeric literals

●

OpenJDK/IcedTea

●

History of Java

●

OpenJDK

●

IcedTea

●

Red Hat's Role

●

The future of Java

●

Version 7

●

JMX enhancements

●

Language changes

●

Strings in switch

●

try-with-resources

●

Diamond operator

●

Numeric literals

●

multi-catch

●

@SafeVarArgs

●

...

●

...

●

...

(55)

Regular catch

●

OpenJDK/IcedTea

●

History of Java

●

OpenJDK

●

IcedTea

●

Red Hat's Role

●

The future of Java

●

Version 7

●

JMX enhancements

●

Language changes

●

Strings in switch

●

try-with-resources

●

Diamond operator

●

Numeric literals

●

multi-catch

●

@SafeVarArgs

●

...

●

...

●

...

(56)

Multi-catch in JDK 7

●

OpenJDK/IcedTea

●

History of Java

●

OpenJDK

●

IcedTea

●

Red Hat's Role

●

The future of Java

●

Version 7

●

JMX enhancements

●

Language changes

●

Strings in switch

●

try-with-resources

●

Diamond operator

●

Numeric literals

●

multi-catch

●

@SafeVarArgs

●

...

●

...

●

...

(57)

Precise re-throw in JDK7

●

OpenJDK/IcedTea

●

History of Java

●

OpenJDK

●

IcedTea

●

Red Hat's Role

●

The future of Java

●

Version 7

●

JMX enhancements

●

Language changes

●

Strings in switch

●

try-with-resources

●

Diamond operator

●

Numeric literals

●

multi-catch

●

@SafeVarArgs

●

...

●

...

●

...

(58)

Safe var-args

With JDK6 (-Xlint:unchecked):

warning: [unchecked] unchecked generic array creation of type

java.util.List<java.lang.String>[] for varargs parameter

printAll(l1, l2);

^

warning: [unchecked] Possible heap pollution from parameterized vararg type T

public <T> void printAll(T... params) {

^

warning: [unchecked] unchecked generic array creation for varargs parameter of

type List<String>[]

printAll(l1, l2);

^

●

OpenJDK/IcedTea

●

History of Java

●

OpenJDK

●

IcedTea

●

Red Hat's Role

●

The future of Java

●

Version 7

●

JMX enhancements

●

Language changes

●

Strings in switch

●

try-with-resources

●

Diamond operator

●

Numeric literals

●

multi-catch

●

@SafeVarArgs

●

...

●

...

●

...

(59)

Safe var-args

No warnings

warning: [unchecked] Possible heap pollution from parameterized vararg type T

public <T> void printAll(T... params) {

^

●

OpenJDK/IcedTea

●

History of Java

●

OpenJDK

●

IcedTea

●

Red Hat's Role

●

The future of Java

●

Version 7

●

JMX enhancements

●

Language changes

●

Strings in switch

●

try-with-resources

●

Diamond operator

●

Numeric literals

●

multi-catch

●

@SafeVarArgs

●

...

●

...

●

...

(60)

Safe var-args

No warnings

●

OpenJDK/IcedTea

●

History of Java

●

OpenJDK

●

IcedTea

●

Red Hat's Role

●

The future of Java

●

Version 7

●

JMX enhancements

●

Language changes

●

Strings in switch

●

try-with-resources

●

Diamond operator

●

Numeric literals

●

multi-catch

●

@SafeVarArgs

●

...

●

...

●

...

(61)

Safe var-args

Error due to @SafeVarargs not being defined

Warning at line 110

No warnings

●

OpenJDK/IcedTea

●

History of Java

●

OpenJDK

●

IcedTea

●

Red Hat's Role

●

The future of Java

●

Version 7

●

JMX enhancements

●

Language changes

●

Strings in switch

●

try-with-resources

●

Diamond operator

●

Numeric literals

●

multi-catch

●

@SafeVarArgs

●

...

●

...

●

...

(62)

NIO2

●

OpenJDK/IcedTea

●

History of Java

●

OpenJDK

●

IcedTea

●

Red Hat's Role

●

The future of Java

●

Version 7

●

JMX enhancements

●

Language changes

●

nio2

●

Fork/Join framework

●

Rest..

●

Version 8

●

Questions...

(63)

File actions

●

Actions provided by class

Files

●

copy()

●

move()

●

delete()

●

create[Symbolic]Link()

●

walkFileTree()

●

etc.

●

OpenJDK/IcedTea

●

History of Java

●

OpenJDK

●

IcedTea

●

Red Hat's Role

●

The future of Java

●

Version 7

●

JMX enhancements

●

Language changes

●

nio2

●

Fork/Join framework

●

Rest..

●

Version 8

●

Questions...

(64)

Attributes

File/Directory

creation time

access time

modification time

size

isFile

isDirectory

isLink

Basic

POSIX

get/setPermissions

get/setGroup

FileOwner

getOwner

setOwner

●

*AttributeView(s)

●

OpenJDK/IcedTea

●

History of Java

●

OpenJDK

●

IcedTea

●

Red Hat's Role

●

The future of Java

●

Version 7

●

JMX enhancements

●

Language changes

●

nio2

●

Fork/Join framework

●

Rest..

●

Version 8

●

Questions...

(65)

Asynchronous I/O

Application thread

I/O thread (sys)

I/O request

Process I/O request

Process callback

handler

Continue normal

execution

Application thread

I/O request (returns Future<Integer>)

Continue normal execution, process

Future<Integer> later

... OR ...

●

OpenJDK/IcedTea

●

History of Java

●

OpenJDK

●

IcedTea

●

Red Hat's Role

●

The future of Java

●

Version 7

●

JMX enhancements

●

Language changes

●

nio2

●

Fork/Join framework

●

Rest..

●

Version 8

●

Questions...

(66)

Change notification

Application Thread

JVM

Thread

Use WatchService

Continue normal

execution

sleep/wait

OS/Poll

●

OpenJDK/IcedTea

●

History of Java

●

OpenJDK

●

IcedTea

●

Red Hat's Role

●

The future of Java

●

Version 7

●

JMX enhancements

●

Language changes

●

nio2

●

Fork/Join framework

●

Rest..

●

Version 8

●

Questions...

(67)

Fork/Join Framework

class Foo extends RecursiveAction {

public Foo(data) { ... }

public void compute() {

if (small) doLocally();

else invokeAll(new Foo(halfData), // first half

new Foo(otherHalfData)); // remaining

}

Thread 1:

Foo.compute()

...

Fork/Join Framework

invokeAll()

Thread 2:

Foo.compute()

Thread 1:

Foo.compute()

Thread N:

●

OpenJDK/IcedTea

●

History of Java

●

OpenJDK

●

IcedTea

●

Red Hat's Role

●

The future of Java

●

Version 7

●

JMX enhancements

●

Language changes

●

nio2

●

Fork/Join framework

●

Rest..

●

Version 8

●

Questions...

(68)

Additional Java 7 features

●

JSR-292 (

invokedynamic

)

●

JDBC 4.1

●

Unicode 6.0

●

Full list at

http://openjdk.java.net/projects/jdk7/features

●

OpenJDK/IcedTea

●

History of Java

●

OpenJDK

●

IcedTea

●

Red Hat's Role

●

The future of Java

●

Version 7

●

JMX enhancements

●

Language changes

●

nio2

●

Fork/Join framework

●

Rest..

●

Version 8

●

Questions...

(69)

(70)

Jigsaw

●

JDK broken into modules based on functionality

●

No more CLASSPATH

●

New format to replace JAR files

●

RPM auto-dependency writing (would be done

by distros)

●

OpenJDK/IcedTea

●

History of Java

●

OpenJDK

●

IcedTea

●

Red Hat's Role

●

The future of Java

●

Version 7

●

Version 8

●

Jigsaw

●

Lambda

●

Language changes

●

Questions...

(71)

Lambda (Closures)

●

Not yet finalized

●

Cleaner syntax and more scalable than

Anonymous Inner Classes

●

Defender methods

●

OpenJDK/IcedTea

●

History of Java

●

OpenJDK

●

IcedTea

●

Red Hat's Role

●

The future of Java

●

Version 7

●

Version 8

●

Jigsaw

●

Lambda

●

Language changes

●

Questions...

(72)

Language Changes (Project Coin)

●

Collections enhancements

●

Collection literals

●

final

List

<Integer> digits = [4, 3, 4];

●

final

Set

<Integer> primes = { 2, 3, 5, 7 };

●

final

Map

<Integer, String> platonicSolids =

{ 4 : "tetrahedron",

6 : "cube",

8 : "octahedron",

12 : "dodecahedron",

20 : "icosahedron" };

●

Numeric suffixes for byte(y/Y) and short (s/S)

●

byte

b = 0xA0y;

●

short

s = 0xA0s;

●

OpenJDK/IcedTea

●

History of Java

●

OpenJDK

●

IcedTea

●

Red Hat's Role

●

The future of Java

●

Version 7

●

Version 8

●

Jigsaw

●

Lambda

●

Language changes

●

Questions...

(73)

Questions?

●

OpenJDK/IcedTea

●

History of Java

●

OpenJDK

●

IcedTea

●

Red Hat's Role

●

The future of Java

●

Version 7

●

Version 8

●

Questions...

OpenJDK:

IcedTea:

IcedTea-Web:

IcedTea Bugs:

RHEL/Fedora bugs:

Mailing List:

[email protected]

IRC:

irc.oftc.net , #openjdk

Deepak Bhole

[email protected]

dbhole on irc

(74)

(75)

(76)

05/06/11

Deepak Bhole

Sr. Software Engineer, Red Hat Inc.

May 5

th

2011

Java - From OpenJDK to Red Hat Enterprise Linux

and What Lies Ahead

(77)

●OpenJDK/IcedTea ●History of Java ●OpenJDK ●_IcedTea ●_{Red Hat's role} ●_{The future of Java}

●_{Version 7} ●_{Version 8} ●_Questions

Agenda

Persistent index will always show current point

This presentation is designed to be used with audio as a primary mode of content delivery. If you have downloaded it,

see notes section for rough notes on applicable slides (draft quality). For pdf, it should be at the end of the slide deck.

(78)

History of Java

●OpenJDK/IcedTea

●History of Java ●OpenJDK ●IcedTea ●_{Red Hat's role} ●The future of Java

●Version 7 ●Version 8 ●Questions

●

Timeline:

1997

Java 1.1

Java 1.2

1998

2002

Java 1.4

2004

Java 5

2006

Java 6

2011

Java 7

1999

LibGCJ

Classpath

2003

GCJ

Plugin

2006

Java

sources

GPLd

2012?

Java 8

+

GCJ stands for

G

NU

C

ompiler for

J

ava

++

GPL stands for GNU

G

eneral

P

ublic

L

icense

●

Only critical releases mentioned:

1.1 Feb 96

1.2 in 98

1.4 in 2002

Java 5 (Generics, major syntax changes) in 2004

Java 6 in 2006

●

OSS dev continued with GCJ release in 1999 and

classpath started picking up around then

●

GCJ WebPlugin in 2003

●

In Nov. 2006, Java/GPL announcement was made

No release since then, breaking the 2-yr cycle

●

Java 7 set for July 28

th

, 2011

(79)

OpenJDK

Community

●OpenJDK/IcedTea ●History of Java ●OpenJDK ●What? ●_{vs JDK} ●_IcedTea ●Red Hat's Role ●_{The future of Java}

●Version 7 ●Version 8 ●_Questions

Apple

+

JDK stands for

J

ava

D

evelopment

K

it

All company logos are copyright by their respective owners

●

This is where most of Java is now developed

●

Oracle, Red Hat, Google, Apple, IBM and others

contribute here

●

Most of the code base is identical to that of

proprietary JDK

●

Certain things are missing, like the plugin, javaws and

(80)

OpenJDK vs JDK (current)

●_{OpenJDK/IcedTea} ●History of Java ●OpenJDK ●What? ●_{vs JDK} ●_Current ●Future ●_IcedTea ●_{Red Hat's Role} ●_{The future of Java}

JDK

OpenJDK

●

Interpreter

●

JIT (Just In Time) compiler

●

Class libraries

●

Public API (Application Programming Interface)

●

Deployment tools

Current state:

●

Class library, VM, compiler, etc. are open

●

Same public API

●

Deployment tools (plugin, webstart, etc.) will remain

(81)

OpenJDK vs JDK (future)

●_{OpenJDK/IcedTea} ●History of Java ●OpenJDK ●What? ●_{vs JDK} ●_Current ●Future ●_IcedTea ●_{Red Hat's Role} ●_{The future of Java}

JDK

OpenJDK

●

Interpreter

●

JIT compiler

●

Class libraries

●

Public API

●

Deployment tools

●

Serviceability tools

Future:

●

Most of the items will stay open

●

In addition to deployment tools, serviceability tools

(e.g Mission Control), will stay closed

(82)

OpenJDK6 vs JDK6

●_{OpenJDK/IcedTea} ●History of Java ●OpenJDK ●What? ●vs JDK ●₆ ●7 ●_IcedTea ●_{Red Hat's Role} ●_{The future of Java}

JDK6 (closed)

OpenJDK (7)

OpenJDK6

JDK7

Proprietary

Semi-open (development in open + some proprietary patches)

Open

●

JDK6 and OpenJDK6 development is not parallel,

and hence the divergence

●

OpenJDK6 was created from OpenJDK7 by removing

the Java 7 specific parts

(83)

OpenJDK7 vs JDK7

JDK

OpenJDK

●

Interpreter

●

JIT compiler

●

Class libraries

●

Public API

●

Deployment tools

●

Serviceability tools?

95%

+

5%

+ +

As heard at JavaOne

Closed

●_{OpenJDK/IcedTea} ●_{History of Java} ●OpenJDK ●What? ●vs JDK ●₆ ●7 ●_IcedTea ●_{Red Hat's Role} ●_{The future of Java}

●

Siblings from same codebase

(84)

What is IcedTea?

IcedTea

…...

●_{OpenJDK/IcedTea} ●_{History of Java} ●OpenJDK ●IcedTea ●What? ●_Why? ●_IcedTea-Web ●Red Hat's Role ●The future of Java

Image sources:

●

OpenJDK Based

●

Contains OpenJDK core, plus build scripts, plus

(85)

Some of the contributors...

●_{OpenJDK/IcedTea} ●_{History of Java} ●OpenJDK ●IcedTea ●What? ●_{Who is involved?} ●Why? ●IcedTea-Web ●_{Red Hat's Role} ●The future of Java

●Version 7 ●_{Version 8} ●Questions

(Indirectly through OpenJDK)

All logos are copyright by their respective owners

(IcedTea-Web only)

●

Oracle is an indirect contributor via OpenJDK

●

RedHat is biggest contributor to IcedTea

(86)

Some of the users...

●_{OpenJDK/IcedTea} ●_{History of Java} ●OpenJDK ●IcedTea ●What? ●_{Who is involved?} ●Why? ●IcedTea-Web ●_{Red Hat's Role} ●The future of Java

●Version 7 ●_{Version 8} ●Questions

(IcedTea-Web only)

●

Used by almost all major Linux distros:

Fedora, RHEL, Ubuntu, Debian, SuSE, etc.

(87)

Why was IcedTea created?

(For the first release...)

Build

●_{OpenJDK/IcedTea} ●_{History of Java} ●_OpenJDK ●IcedTea ●What? ●_Why? ●_IcedTea-Web ●Red Hat's Role ●The future of Java

Image sources:

●

Initial OpenJDK drop did not build easily

(88)

To fix the build...

Build

●_{OpenJDK/IcedTea} ●_{History of Java} ●_OpenJDK ●IcedTea ●What? ●_Why? ●_IcedTea-Web ●Red Hat's Role ●_{The future of Java}

Image sources:

●

IcedTea was primarily created to fix the build issues

and create a re-distributable JDK based on

OpenJDK.

(89)

To fill what's missing...

JDK

●

HotSpot Virtual machine

●

Interpreter

●

JIT compiler

●

Class libraries

...

●

Deployment tools

●

Deployment tools

●

IcedTea has gradually taken on other roles...

(90)

To back patch fixes...

JDK

●

Interpreter

●

JIT compiler

●

Class libraries

...

●

Deployment tools

●

Deployment tools

●

It provides backward patch maintenance for up to n-2

(91)

To support additional architectures...

JDK

●

Interpreter

●

JIT compiler

●

Class libraries

...

●

Deployment tools

●

Deployment tools

Shark/Zero

Implemented independently

Image sources:

●

It provides additional runtime support. Most notably

Shark/Zero so that OpenJDK can run on other

platforms.

●

Almost all of the Shark/Zero porting work was done

by Red Hat.

●

IcedTea also supports Cacao and JamVM (as an

alternate to the HotSpot VM, with the OpenJDK class

libraries)

(92)

To support additional tools...

JDK

●

Interpreter

●

JIT compiler

●

Class libraries

...

●

Deployment tools

●

Deployment tools

Shark/Zero

●

It provides additional tooling support, like for

VisualVM (now via a separate visualvm-harness

project under the IcedTea umbrella)

(93)

Fixes (with OpenJDK)

I found a bug, here

is the patch!

the next update

whenever it

happens*

* OpenJDK has a slower release cycle and it is not set in advance

Image sources:

●

Patches submitted to OpenJDK can take an arbitrary

amount of time depending on when the next release

happens.

(94)

I found a bug,

here is the

patch!

the next update

soon*!

* IcedTea has a faster release cycle dictated by importance of fixes since last release

●

Patches submitted to IcedTea have a faster

turnaround as IcedTea releases more frequently, and

depending on the severity of the issue, can do a

(95)

I found a bug,

here is the

patch!

the next update

soon!

Here is a nice

patch from Mr.

Green.

Thanks! It will be

in the next update!

…...

No problem! We will

maintain it locally till then.

●

Behind the scenes, IcedTea developers make sure

that the patch is okay for OpenJDK, and then take on

the responsibility of local patch maintenance until the

next OpenJDK update (assuming it was accepted)

●

Sometimes fixes are not accepted, in which case

(96)

JDK

OpenJDK

IcedTea

Distros

Update

planned

Patches

sent

Distros

notified

Public release

Not in code base

All company logos are copyright by their respective owners

●

When a security update is planned, Oracle gets the

patches ready and notifies Red Hat and select

others.

●

IcedTea developers then put together a release, and

send a preview copy to trusted distro maintainers for

testing.

●

On a preset date and time, Oracle makes the

vulnerabilities public and distros release updates

thereafter

(97)

IcedTea-Web

Web Browser Plugin

Web Start (javaws)

Settings tool (itweb-settings)

Image sources:

●

IcedTea-Web contains:

The plugin

Webstart

itweb-settings

(98)

Fully Open Source

+

Classpath Exception

+

GPL stands for GNU

G

eneral

P

ublic

L

icense

++

LGPL stands for GNU

L

esser

G

eneral

P

ublic

L

icense

Image source:

http://www.gnu.org/graphics/official%20gnu.svg

GPL

LGPL

●

All the code is IcedTea-Web is Open Source. Parts

from NetX are under LGPL, the plugin/javaws is

GPL+Classpath, while the settings tool is GPL

(99)

Completeness

Plugin is almost fully complete

Web Start is slightly lagging, but has support for all of

the widely used features

●

Chart is more to show comparative completeness.

WebStart is slightly lagging.

●

However, both components contain the widely used

features. Most of the missing features are

(100)

IcedTea

Distros

Update

planned

Distros

notified

Public release

●_{Version 7} ●Version 8 ●_Questions

Not in code base

●

As with IcedTea, when a security release is due,

distros are notified earlier and sent an encrypted

tarball so that they can test the fixes.

(101)

(102)

Settings configuration tool

●

Screenshot of settings tool showing security

(103)

IcedTea6

Red Hat Others

0 500 1000 1500 2000 2500

IcedTea6 commits

●_{OpenJDK/IcedTea}

●_{History of Java} ●_OpenJDK ●IcedTea ●Red Hat's Role

●IcedTea ●_IcedTea-Web ●Upstream ●RHEL/Fedora ●The future of Java

* Approximate numbers as of 17:00 EDT on 2011-04-28

#!/bin/bash

dlila|[email protected]"

TOTAL=`hg log | grep "user:" | grep -E "$USERS" | wc -l`

TOTALCOMMITS=`hg log | grep changeset | wc -l`

# Filter out Andrew's commits before he joined Red Hat

ANDREWS_RH_COMMITS=`hg log --date "2008-10-20 to 2011-04-28" | grep

"user:" | grep andrew | grep -v redhat.com | wc -l`

TOTAL=`echo $TOTAL + $ANDREWS_RH_COMMITS | bc -l`

echo "Total: $TOTAL"

(104)

IcedTea (7)

Red Hat Others

0 500 1000 1500 2000 2500

IcedTea (7) commits

●IcedTea ●_IcedTea-Web ●_Upstream ●RHEL/Fedora ●The future of Java

* Approximate numbers as of 17:00 EDT on 2011-04-28

(105)

Role in IcedTea-Web

Red Hat Others

0 50 100 150 200 250

IcedTea-Web commits

* Approximate numbers as of 17:00 EDT on 2011-04-28

(106)

●

OpenJDK7 OpenJDK6

●

Majority of OpenJDK6 commits are backports

●

The backport process

●

Red Hat is the primary backporter for

OpenJDK6

(107)

OpenJDK7 contribution

* Figures are approximate, and do not account for merge commits

** Apple's contributions have been normalized from 81/8889 (OSX port) to 76/8337

Oracle+Community Google Red Hat Apple 1 10 100 1000 10000

OpenJDK7 commits

As of 2011-04-28, 16:00 EDT*

Total: 8337

Oracle + community: 7998

Google: 136 (1.63%)

Red Hat: 127 (1.52%)

Apple: 76** (0.09%)

(

Logarithmic

)

●_{OpenJDK/IcedTea} ●_{History of Java} ●_OpenJDK ●IcedTea ●Red Hat's Role

#!/bin/bash

if [ "$1" == "redhat" ]; then

USERS="langel aph andrew gbenson ptisnovs omajid dlila dbhole mwong"

elif [ "$1" == "google" ]; then

USERS="ahe hiroshi jjb rasbold"

elif [ "$1" == "apple" ]; then

USERS="astrange bino kmiller loefty rhoover swingler"

else

USERS="$*"

fi

TEMP_FILE="/tmp/jdk.commits.log"

TOTAL=0

TOTALDUPLICATES=0

TOTALCOMMITS=0

for dir in . corba hotspot jaxp jaxws jdk langtools; do

grep -E "^user:|^Reviewed-by|^Contributed-by:" | tr '\n' ' ' | perl -p -e s/user:/\\nuser:/g >

$TEMP_FILE

for uid in $USERS; do # for each user

USERS_TO_EXCLUDE=`echo $USERS | sed -e s:$uid::g | sed -e s:" ":" ":g -e s:"^ "::g -e s:"

$"::g | tr ' ' '|'`

USERTOTAL=0

COUNT=`grep " $uid" $TEMP_FILE | wc -l`

DUPLICATED_USERS=`grep " $uid" $TEMP_FILE | grep -E " $USERS_TO_EXCLUDE" | wc -l`

USERTOTAL=`echo $USERTOTAL + $COUNT | bc -l`

TOTALDUPLICATES=`echo $TOTALDUPLICATES + $DUPLICATED_USERS | bc -l`

TOTAL=`echo $TOTAL + $USERTOTAL | bc -l`

done

COMMITS_IN_DIR=`wc -l $TEMP_FILE | awk '{print $1}'`

TOTALCOMMITS=`echo $TOTALCOMMITS + $COMMITS_IN_DIR | bc -l`

done

rm -f $TEMP_FILE

# Account for commits by Chris Phillips after he started at Red Hat (2011-02-01+)

if [ "$1" == "redhat" ]; then

TOTAL=`echo $TOTAL + 1 | bc -l`

fi

TOTAL=`echo $TOTAL - "($TOTALDUPLICATES/2)" | bc -l` # assume duplicates == max 2 users

echo "Total: $TOTAL"

echo "Total duplicates: $TOTALDUPLICATES"

echo "Total commits: $TOTALCOMMITS"

(108)

IcedTea* contribution

Red Hat Others 0 500 1000 1500 2000 2500

IcedTea6 commits

Red Hat Others 0 500 1000 1500 2000

IcedTea (7) commits

Red Hat Others 0 50 100 150 200 250

IcedTea-Web commits

2159 out of 2587, 83.4%

1988 out of 2431, 81.7%

223 out of 234, 95.3%

●IcedTea ●IcedTea-Web ●_Upstream ●RHEL/Fedora ●The future of Java

(109)

OpenJDK RPM in RHEL

OpenJDK

IcedTea

RPM

●IcedTea ●IcedTea-Web ●_Upstream ●RHEL/Fedora

●The future of Java ●Version 7 ●Version 8 ●Questions

+

RPM stands for

R

PM

P

ackage

M

anager

●

RPM contains IcedTea which in turn contains

(110)

OpenJDK

IcedTea

RPM

Accepted upstream

IcedTea release

RHEL release

OpenJDK release

●OpenJDK/IcedTea ●History of Java ●OpenJDK ●IcedTea ●_{Red Hat's Role}

●_IcedTea ●IcedTea-Web ●Upstream ●RHEL/Fedora

●_{The future of Java} ●Version 7 ●_{Version 8} ●Questions

Red Hat Enterprise Linux release is subject to results of:

●

TCK tests

(api, compiler, dev)

●

Jtreg tests

(regression)

●

Mauve tests

(class library)

●

Spec* tests

(performance)

●

Java2dBenchmark tests

(drawing perf.)

●

JFCMark tests

(swing perf.)

●

(111)

Prioritized release

OpenJDK

IcedTea

RPM

Accepted upstream

IcedTea release

Prioritized release

OpenJDK release

●IcedTea ●IcedTea-Web ●_Upstream ●RHEL/Fedora

●The future of Java ●Version 7 ●Version 8 ●Questions

Release subject to results of:

●

TCK (api, compiler, dev) tests

●

JTreg (regression) tests

●

Mauve (class library) tests

●

Spec* (performance) tests

●

Java2dBenchmark (drawing perf.) tests

●

JFCMark (swing perf.) tests

●

Early backports into RPMs if needed

(112)

Links

OpenJDK:

IcedTea:

IcedTea-Web:

IcedTea Bugs:

RHEL/Fedora bugs:

Mailing List:

[email protected]

IRC:

irc.oftc.net, #openjdk

Deepak Bhole

[email protected]

dbhole on irc

(113)

(114)

JMX Enhancements

●

ManagementFactory.getAllPlatformMXBeanInterfaces()

●

Everything inherits from PlatformManagedObject

●

New MBeans

●

java.lang.management.BufferPoolMXBean

●

java.lang.management.PlatformLoggingMXBean

●_{OpenJDK/IcedTea} ●History of Java ●_OpenJDK ●_IcedTea ●Red